Mike holts illustrated guide to understanding nec requirements. This illustration in the grounding vs bonding book indicates that fmc may be used as a egc regardless of its length as long as the ocpd is not over 20a. Grounding rod connection from meter box electrical. This is a discussion of the basic principles behind grounding systems and how grounding is related to safety and the effective operation of circuit protection devices such as fuses and circuit breakers. What does bonding bonded mean and what does nec say. If you are one of these folks dont feel badly, you are not alone.
Bonding jumpers shall be installed around any section of nonmetallic duct, pipe, device or fitting that will break the continuity of the ground. Ian fleming publications recently announced that stephen cole is going to continue writing the young bond series, with the next book planned to be released in late 2014. Bonding vs antibonding molecular orbitals the difference between bonding and antibonding molecular orbitals can be best explained using molecular orbital theory. What is the difference between grounding and bonding. One of the most confusing areas of the trade continues to be bonding and grounding. In usa term grounding is used but in uk term earthing is used. Mikes ability to explain these rules and the practical application of these rules in real world settings will help you really understand how to apply the nec everyday. Grounding and bonding with concentric and eccentric knockouts bonding at services nec section 250. Home our work for families articles for families on literacy bond through reading. The electrical continuity of boxes, raceways and fittings must be assured both within the hazardous locations and back to. Difference between bonding and antibonding molecular. The electrical theory behind this difficult to understand article 250 has been applied throughout, helping to make it easier for students of the electrical profession to grasp the concepts of bonding and grounding.
Soares book on grounding and bonding 9th edition book. Within the system, some things are grounded some things are bonded. One of the most misunderstood and confused concept is difference between bonding, grounding and earthing. The grounding and bonding requirements in this column apply to solidly grounded systems that operate at not more than 600v, such as 120240v, 120208v, and 277480v. The james bond novels have been adapted for a lot of mediums. Earthing and grounding are actually different terms for expressing the same concept. The auxiliary grounding electrode must be connected to the equipment grounding conductor in addition to the frame of the generator. Simmons serves nfpa on code making panel5 of the national electrical code committee grounding and bonding, and he previously served on the nfpa standards council, the nec technical correlating committee, the iaei, and underwriters laboratories. The grounding and bonding requirements in this column apply to solidly grounded. The extensive graphics show current flow in both normal. Bonding is more clear word compare to grounding and earthing, but there is a micro difference between grounding and earhing.
These two types of molecular orbitals are formed when covalent chemical bonds are formed. More than any other topic in the electrical industry, bonding and grounding is at the core of most power quality, and safety issues, making this book a musthave. Arrl technical grounding and bonding for the radio. Mike holts illustrated guide to nec requirements for grounding vs. The text beautifully clears up misconceptions about grounding vs. This grounding connection is in addition to the grounding and bonding required by either 250. Book on grounding use the same physics and electrical theory as art. Any intentional or accidental connection between an electrical circuit or instrument and the earth is known as grounding.
A bilingual good night story to promote secure attachment and bonding with your child spanish spanish edition. Even though there is a micro difference between grounding and earthing. Bioadoptionfoster mom lauren jones examines why shared reading time is so important for bonding with each and every child. For those eager to improve their skills in electrical grounding and bonding, this is the book to get. Grounding of electrical systems outline zdefining the terms zwhy should i ground. Knowing that bonding system is working is good for peace of mind and more.
More than any other topic in the electrical industry, grounding and bonding is at the core of. Byron kirby explains grounding, bonding, the difference, and the correct application for both. Online shopping from a great selection at books store. Really understanding how her electrical system can damage a boats metal components will help you to avoid costly replacements and repairs. All code references are based on the 2005 national electrical code. Mike holts illustrated guide to grounding versus bonding 2011 edition w answer.
Mike holts illustrated guide to grounding versus bonding 2011 edition wanswer. West marine is committed to outfitting your life on the water. While earthing is done not for return path but only for protection of delicate equipments. What are the nec requirements for grounding and bonding. An interview with mem fox mem fox is picture book author of many beloved books for children, including ten little fingers and ten little toes.
Bond conductor size shall be determined by the ampere rating of the service entrance equipment as shown on the grounding and bonding table. Grounding and bonding as electrical installation protocols overlap to a certain extent, but they are not identical. Need information on grounding and bonding rules within the national electrical code. Electrical inspectors publication, soares book on grounding and bonding, 9th edition, for added information. A text book example of how not to make a bonding system connection. Return that book if you still can, is based on the nec and all you will do is make a mess of your understanding of grounding bonding, i was a certified electrician in the us for a few years and now im certified in canada, and for sure there are differences in names, terms, materials allowed, and even concepts but in the end the same physics rules apply, there is an agenda and little by.
Johnston neca executive director, standards and safety 1 welcome to a neca webinar based on the national electrical code. This publication is intended to be a resource for contractors, architects, engineers, educators, project owners and others involved with the construction process. More than any other topic in the electrical industry, grounding and bonding is at the core of most power quality, and safety issues, making this book a must have. He is a retired member of the international brotherhood of electrical workers. Mike holts illustrated guide to bonding and grounding. Generator grounding and bonding essentials electrical.
We additionally see requirements for bonding steel rebar in concrete in ieee 1100 emerald book section 8. Ground is a source for unwanted currents and also as a return path for main current some times. The cec and nec provide some identical methods for bonding electrical equipment, raceways, cable sheaths, etc. The earth is not permitted as an effective ground fault current path. Bonding, grounding and neutral conductors does size. Issues crop up when equipment bonding grounding and earthing are confused. Bonding belongs in the hands of every electrician, inspector, and engineer who needs to understand the, seemingly conflicting, information of how to properly apply the nec rules of grounding and bonding. Discover delightful childrens books with prime book box, a subscription that. Grounding and bonding for the radio amateur shows you how to make sure your station follows current standards for lightning protection and communication systems, not to mention the national electrical code. Youll learn effective grounding and bonding techniques for home stations, including condos and apartments, portable and temporary.
Article 250 grounding and bonding mike holt enterprises. Principles of electrical grounding john pfeiffer, p. I should add language about the bonding of the water pipes in case they become energized in my reports. Bonding is the process of connecting to conductive objects together. Soares book on grounding and bonding 9th edition by. Grounding, bonding, safety, rfi by bill mader, k8te. What is the difference between bonding, grounding and.
Requirements for a concrete encased electrode, if used, are listed as follows iec 623053, nfpa 702017, and nfpa 780. Additionally, mike has color coded the graphics so you can easily differentiate between bonding and grounding. Bonding and breaks down each of the code articles that deal with this topic. Magnetic build up, harmonics, transients, emiemf and other objectionable currents that can build up on steel rebar will need a path to ground. Bonding ensures safe electrical continuity while grounding ensures that all metal parts of an electrical circuit that an individual might contact are connected to the earth, thus ensuring zero voltage. This seminar is the first in a short series of electrical grounding and bonding webinars presented by neca. I was definitely talking about the supplemental grounding electrode here in reference to the water pipe connection, because i have seen grounding rod connections hacked by sloppy yard. One of the most confusing areas of the trade continues to be grounding and bonding. Grounding and bonding means that conductive parts are connected together and to the earth. If someone were to investigate which nec article suffers from the most misapplications, violations, and misinterpretations, theyd find that art. Your boat will thank you with better performance and improved reliability. Its a truism, electrical systems, and electricity in general. Ieee industry applications society atlanta chapter january 19, 2010 meeting 2 purpose of grounding lightning and surge protection stabilize circuit potential and assist in proper operation of. In bonding, the emphasis is on creating lowimpedance electrical connections between two or more conductive metallic bodies that are not normally currentcarrying.
Grounding and bonding cecnec how different are they. First as we move around in the world electric charges are everywhere think static electricity. Grounding and bonding with concentric and eccentric. Mike holts illustrated guide to grounding versus bonding 2011. Metal objects have a tendency to accumulate a charge.
Not only does it explain how and why certain grounding methods are used, but it does so in a logical way, balancing text with photos and illustrations. Enhance your electrical skills with soares book on grounding and bonding based on the 2011 national electrical code. With over 250 store locations, 100,000 products in stock, and knowledgeable associates, trust west marine for your boating, sailing, fishing, or paddling needs. The power of books books are infinitely more than words on a page theyre soul food for our families. Bonding is generally done as protection from electrical shocks.
Mike holts illustrated guide to nec requirements for bonding and grounding belongs in the hands of every electrician, inspector, and engineer who needs to understand the seemingly conflicting information of how to properly apply these particular nec rules. The basic bond book provides an overview of contract surety bonding. Isolated connections to earth are not required for sensitive machine operation. Mike holts illustrated guide to understanding 2011 nec requirements for grounding vs. The most significant difference between bonding and antibonding molecular orbitals is their energy levels compared to the parent. To understand why this is important we must acknowledge some basic facts. Bonding is the lasting joining of metallic pieces to form a conducting path which ensures safe electrical continuity. No other article can match article 250 for misapplication, violation, and misinterpretation.
But there are also some differences between the codes as shown in the table directly above. The terms grounding and bonding are used throughout the nec. In the united states, the term grounding is used to refer to at least five or more grounding related systems, including. Bonding systems and corrosion prevention steve dantonio. Nevertheless, i routinely receive emails and phone calls with the questions about differences between bonding, grounding and neutral conductors, about differences in use of these conductors under the rules of the canadian electrical code and about differences. Understanding the differences between bonding, grounding. There are other books still to come, about bonds life.
The book brings together material from numerous amateur radio and industry sources to present a comprehensive picture of basic grounding and bonding. W5ur longer lives for you and your radio safety first grounding bonding keep the noise down rfiradio frequency interference buy the book by n0ax. Bonding and grounding requirements overlap somewhat, but they all have a common interest that of preventing electrical shocks and electrical fires there is a distinct difference between grounding and bonding. This video shows why equipotential grounding usually provides better protection than bracket grounding, for workers on deenergized electrical lines.
1299 285 1144 590 927 1469 1224 1416 305 1347 1004 1408 358 1403 93 1170 995 1256 584 583 794 1127 737 285 1062 1509 471 588 45 1013 3 1551 852 216 959 216 1242 420 789 895 1033